Control section determines necessary acceleration of a transporting section in accordance with an actual transporting speed, and also determines a correction coefficient corresponding to the number of rotations of an engine from among correction coefficients having a characteristic of becoming closer to a value of one as the number of rotations of the engine increases. The EP image-forming device has a primary charger, an exposure device, a toning station, a transfer charger, a fusing station, and a cleaner operatively disposed about a photoconductor. Based on the comparison of the battery status data to the predefined battery status threshold, a battery status indicator may be provided to an applications program on the computing device. The shaft member is supported for rotation in the belt unit such that it contacts the inside surface of the belt member and pushes the belt member outward at the position it faces the image read sensor across the belt member when the belt unit is mounted to the casing of the apparatus. A magnetic tape head in another embodiment comprises a substrate; a closure separated from the substrate by an insulative portion; and at least one connective element coupling the substrate and closure together.